3 files changed, 20 insertions, 15 deletions

diff --git a/indra/newview/llviewertexture.cpp b/indra/newview/llviewertexture.cpp
index d16656abfc..681d91c945 100644
--- a/indra/newview/llviewertexture.cpp
+++ b/indra/newview/llviewertexture.cpp
@@ -1553,6 +1553,17 @@ void LLViewerFetchedTexture::postCreateTexture()
 
     setActive();
 
+    // rebuild any volumes that are using this texture for sculpts in case their LoD has changed
+    for (U32 i = 0; i < mNumVolumes[LLRender::SCULPT_TEX]; ++i)
+    {
+        LLVOVolume* volume = mVolumeList[LLRender::SCULPT_TEX][i];
+        if (volume)
+        {
+            volume->mSculptChanged = true;
+            gPipeline.markRebuild(volume->mDrawable);
+        }
+    }
+
     if (!needsToSaveRawImage())
     {
         mNeedsAux = false;
@@ -2647,7 +2658,7 @@ void LLViewerFetchedTexture::destroyRawImage()
     if (mAuxRawImage.notNull() && !needsToSaveRawImage())
     {
         sAuxCount--;
-        mAuxRawImage = NULL;
+        mAuxRawImage = nullptr;
     }
 
     if (mRawImage.notNull())
@@ -2662,7 +2673,7 @@ void LLViewerFetchedTexture::destroyRawImage()
             }
         }
 
-        mRawImage = NULL;
+        mRawImage = nullptr;
 
         mIsRawImageValid = false;
         mRawDiscardLevel = INVALID_DISCARD_LEVEL;
@@ -2774,7 +2785,9 @@ void LLViewerFetchedTexture::readbackRawImage()
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_TEXTURE;
 
-    if (mGLTexturep.notNull() && mGLTexturep->getTexName() != 0 && mRawImage.isNull())
+    // readback the raw image from vram if the current raw image is null or smaller than the texture
+    if (mGLTexturep.notNull() && mGLTexturep->getTexName() != 0 &&
+        (mRawImage.isNull() || mRawImage->getWidth() < mGLTexturep->getWidth() || mRawImage->getHeight() < mGLTexturep->getHeight() ))
     {
         mRawImage = new LLImageRaw();
         if (!mGLTexturep->readBackRaw(-1, mRawImage, false))
diff --git a/indra/newview/llvovolume.cpp b/indra/newview/llvovolume.cpp
index 7da4358f86..4b63354893 100644
--- a/indra/newview/llvovolume.cpp
+++ b/indra/newview/llvovolume.cpp
@@ -1149,7 +1149,7 @@ void LLVOVolume::updateSculptTexture()
         {
             mSculptTexture = LLViewerTextureManager::getFetchedTexture(id, FTT_DEFAULT, true, LLGLTexture::BOOST_SCULPTED, LLViewerTexture::LOD_TEXTURE);
             mSculptTexture->forceToSaveRawImage(0, F32_MAX);
-            mSculptTexture->addTextureStats(256.f*256.f);
+            mSculptTexture->setKnownDrawSize(256, 256);
         }
 
         mSkinInfoUnavaliable = false;
@@ -1251,7 +1251,7 @@ void LLVOVolume::sculpt()
             discard_level = mSculptTexture->getSavedRawImageLevel();
         }
 
-        if (!raw_image)
+        if (!raw_image || raw_image->getWidth() < mSculptTexture->getWidth() || raw_image->getHeight() < mSculptTexture->getHeight())
         {
             // last resort, read back from GL
             mSculptTexture->readbackRawImage();
@@ -1338,17 +1338,8 @@ void LLVOVolume::sculpt()
                 mSculptTexture->updateBindStatsForTester() ;
             }
         }
-        getVolume()->sculpt(sculpt_width, sculpt_height, sculpt_components, sculpt_data, discard_level, mSculptTexture->isMissingAsset());
 
-        //notify rebuild any other VOVolumes that reference this sculpty volume
-        for (S32 i = 0; i < mSculptTexture->getNumVolumes(LLRender::SCULPT_TEX); ++i)
-        {
-            LLVOVolume* volume = (*(mSculptTexture->getVolumeList(LLRender::SCULPT_TEX)))[i];
-            if (volume != this && volume->getVolume() == getVolume())
-            {
-                gPipeline.markRebuild(volume->mDrawable, LLDrawable::REBUILD_GEOMETRY);
-            }
-        }
+        getVolume()->sculpt(sculpt_width, sculpt_height, sculpt_components, sculpt_data, discard_level, mSculptTexture->isMissingAsset());
     }
 }
 
diff --git a/indra/newview/llvovolume.h b/indra/newview/llvovolume.h
index 6241bf42d6..97a5131260 100644
--- a/indra/newview/llvovolume.h
+++ b/indra/newview/llvovolume.h
@@ -451,6 +451,7 @@ public:
 private:
     friend class LLDrawable;
     friend class LLFace;
+    friend class LLViewerFetchedTexture;
 
     bool        mFaceMappingChanged;
     LLFrameTimer mTextureUpdateTimer;